The USB charge lasts for 120 hours. When the lock is locked, it does not open and it is impossible to break it by hand. Set the time reasonably. USB lithium battery charging, with display and 3 small buttons to set hours or minutes, the maximum setting time is 99 hours and 59 minutes. The padlock combination is light and suitable for airport and travel security. You can lock your important items at any time to protect your privacy. 1:Press the center of the LCD screen to remove the protective film and tear off the film. You will find a stop under a screw on the left side of the screen. 2: Find a metal pin or metal clip and insert it into the hole until the end, then drive it. 3: When you hear a "Bi" sound (in audio mode) the LCD will display correctly. The timeout has been reset. 4: Please glue back the protective film. Color: black, white Package list: 1*Electronic lock Note: 1. Please allow a little error due to manual measurement. Make sure you don't mind before bidding< br> 2. The color may vary depending on the display. Please understand< br> Note: Hello, please pay attention to your shipping address when purchasing products. If your receiving information (such as name, street, house number, doorbell/email without name) is incorrect, the order will not be delivered correctly.)